package filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;

@WebFilter(filterName = "isLoginPageFilter", urlPatterns = {
        "/center/*",
        "/admin/*"
})
public class isLoginPageFilter implements Filter {
    public void destroy() {
    }

    public void doFilter(ServletRequest req, ServletResponse resp, FilterChain chain) throws ServletException, IOException {
        HttpServletRequest request = (HttpServletRequest) req;
        HttpServletResponse response = (HttpServletResponse) resp;
        HttpSession session = request.getSession();
        if (session.getAttribute("userMsg") == null) {
            response.sendRedirect(request.getServletContext().getContextPath() + "/login.jsp");
            return;
        }
        chain.doFilter(req, resp);
    }

    public void init(FilterConfig config) throws ServletException {

    }

}
